Brini Layla, Bennour Ines, Toncelli Alessandra, Maalej Ramzi, Abdelhedi Mohamed
Laboratory of Inorganic Chemistry, Faculty of Sciences of Sfax, Sfax University, Sfax 3018, Tunisia.
Laboratory of Dielectric and Photonic Materials, Faculty of Sciences of Sfax, Sfax University, Sfax 3018, Tunisia.
Materials (Basel). 2022 Mar 25;15(7):2423. doi: 10.3390/ma15072423.
Undoped YSnO and Eu doped YSnO samples with doping concentrations 7%, 8%, 9%, and 10% are successfully synthesized by the co-precipitation method. A complete structural, morphological, and spectroscopic characterization is carried out. XRD measurements reveal that samples crystallize in the pure single pyrochlore phase and Eu ions occupy sites with D symmetry. After mechanical grinding, the average crystallite size is less than 100 nm for all compositions. Optical characterization shows emission from the D level towards the lower lying F levels. The CIE color coordinates of all the pyrochlore phosphors are very close to those of the ideal red light. For the visualization of latent fingerprints, different surfaces are tested, including difficult ones (wood and ceramic), with excellent results. All three levels of fingerprint ridge patterns are visualized: core (Level 1), bifurcation and termination (Level 2), and sweat pores (Level 3). Moreover, our nano-powders are used to prepare a stable fluorescent ink.
采用共沉淀法成功合成了未掺杂的YSnO以及掺杂浓度为7%、8%、9%和10%的Eu掺杂YSnO样品。进行了完整的结构、形态和光谱表征。X射线衍射测量表明，样品结晶为纯单相焦绿石相，Eu离子占据具有D对称性的位点。机械研磨后，所有组成的平均微晶尺寸均小于100 nm。光学表征显示从D能级向下较低的F能级发射。所有焦绿石荧光粉的CIE色坐标都非常接近理想红光的色坐标。为了可视化潜在指纹，测试了不同的表面，包括难处理的表面（木材和陶瓷），结果极佳。所有三个级别的指纹脊图案都能被可视化：核心（一级）、分叉和终止（二级）以及汗孔（三级）。此外，我们的纳米粉末被用于制备一种稳定的荧光墨水。
